# -*- coding: utf-8 -*-
"""
Created on Sun Oct 13 22:52:27 2019

@author: ASUS
"""

import matplotlib.pyplot as plt
import numpy as np
x = np.linspace(-3,3,50)
y1 = 2 * x + 1
y2 = x ** 2

plt.figure()
plt.plot(x,y1)

plt.figure(num = 3,figsize = (8,5))
plt.plot(x,y2)
plt.plot(x,y1,color='red',linewidth=5.0,linestyle='-.')

plt.show()